The Experts below are selected from a list of 1586529 Experts worldwide ranked by ideXlab platform

Ibrahim M. Elmojtaba - One of the best experts on this subject based on the ideXlab platform.

  • Mathematical analysis of a time delay visceral leishmaniasis Model
    Journal of Applied Mathematics and Computing, 2020
    Co-Authors: Velmurugan Gandhi, Nasser S. Al-salti, Ibrahim M. Elmojtaba
    Abstract:

    In this paper, we discuss some of the dynamical characteristics of a visceral leishmaniasis (VL) Model with time delay. We have derived sufficient conditions to ensure the stability of the Considered delayed VL Model at the steady states. Taking the time delay as a bifurcation parameter, we have established a criteria for the existence of Hopf bifurcation of the Considered Model. Moreover, conditions for global stability of the steady states are also presented. Finally, some numerical simulations are given to show the effectiveness of our theoretical results.

Yu P Bliokh - One of the best experts on this subject based on the ideXlab platform.

  • wave localization as a manifestation of ray chaos in underwater acoustics
    Communications in Nonlinear Science and Numerical Simulation, 2003
    Co-Authors: Alexander Iomin, Yu P Bliokh
    Abstract:

    Abstract Wave chaos is demonstrated by studying a wave propagation in a periodically corrugated waveguide. In the limit of a short wave approximation (SWA) the underlying description is related to the chaotic ray dynamics. In this case the control parameter of the problem is characterized by the corrugation amplitude and the SWA parameter. The Considered Model is fairly suitable and tractable for the analytical analysis of a wave localization length. The number of eigenmodes characterized the width of the localized wave packet is estimated analytically.

S. A. Larin - One of the best experts on this subject based on the ideXlab platform.

  • Higher derivative relativistic quantum gravity
    Modern Physics Letters A, 2018
    Co-Authors: S. A. Larin
    Abstract:

    Relativistic quantum gravity with the action including terms quadratic in the curvture tensor is analyzed. We derive new expressions for the corresponding Lagrangian and the graviton propagator within dimensional regularization. We argue that the Considered Model is a good candidate for the fundamental quantum theory of gravitation.

  • Higher Derivative Relativistic Quantum Gravity
    viXra, 2017
    Co-Authors: S. A. Larin
    Abstract:

    Relativistic quantum gravity with the action including tems quadratic in the curvature tensor is analyzed. We derive new expressions for the crresponding Lagrangian and the graviton propagator. We argue that the Considered Model is a good candidate for the fundamental quantum theory of gravitation.

Velmurugan Gandhi - One of the best experts on this subject based on the ideXlab platform.

  • Mathematical analysis of a time delay visceral leishmaniasis Model
    Journal of Applied Mathematics and Computing, 2020
    Co-Authors: Velmurugan Gandhi, Nasser S. Al-salti, Ibrahim M. Elmojtaba
    Abstract:

    In this paper, we discuss some of the dynamical characteristics of a visceral leishmaniasis (VL) Model with time delay. We have derived sufficient conditions to ensure the stability of the Considered delayed VL Model at the steady states. Taking the time delay as a bifurcation parameter, we have established a criteria for the existence of Hopf bifurcation of the Considered Model. Moreover, conditions for global stability of the steady states are also presented. Finally, some numerical simulations are given to show the effectiveness of our theoretical results.

Jean-claude Vivalda - One of the best experts on this subject based on the ideXlab platform.

  • State estimation for a fish population via a nonlinear observer
    Proceedings of the 2000 American Control Conference. ACC (IEEE Cat. No.00CH36334), 2000
    Co-Authors: Abderrhaman Iggidr, Mohamed Oumoun, Jean-claude Vivalda
    Abstract:

    Focuses on the construction of an exponential observer for an age-structured Model of an exploited fish population in order to get an estimation of the number of fishes by age class. The Considered Model is nonlinear and involves a stock-recruitment function which is not well known. The observer that we construct is independent of this function.

  • State estimation for a fish population via a nonlinear observer
    2000
    Co-Authors: Abderrhaman Iggidr, Mohamed Oumoun, Jean-claude Vivalda
    Abstract:

    This paper focuses on the construction of an exponential observer for an age-structured Model of an exploited fish population in order to get an estimation of the number of fishes by age class. The Considered Model is nonlinear and involves a stock-recruitment function which is not well known. The observer that we construct is independent of this function.